The app will then use those keywords and search Google up to 500 times per month for your service in the chosen area. If your site is not found it will go directly to your website, crawl it, end on the contact page and then close the search. This is a signal to Google that your website is the relevant answer to the search, thus increasing your ranking. It’s important to note that each device searches 250 times pm, so two devices will give you a full 500 searches pm.